Migration Center comes up on the Professional Cloud Architect exam in a narrow but important way. The question almost always involves estimating the cost of moving an existing on-premises environment to Google Cloud, and the answer choices usually include both Migration Center and the Pricing Calculator. I want to walk through what Migration Center actually does, the workload types it can auto-discover, and the exam cue that should push you toward Migration Center over the Pricing Calculator.
Migration Center is Google Cloud's centralized tool for discovering, assessing, and planning migrations from on-premises environments or other clouds to GCP. It is the single console where you go to figure out what you have, what it would cost to run on Google Cloud, and how to actually move it.
The end-to-end workflow has five phases. You start with estimate, which generates cost projections for running your workloads on GCP. Then discover, which scans your environment and creates an inventory of assets, whether those are VMs, databases, or applications. Then assess, where you look at which workloads are good fits for migration and what dependencies exist between them. Then plan, where you put together your migration strategy, the order of operations, and the risks. Finally migrate, where Migration Center hands off to other Google tools to execute the actual move.
For the Professional Cloud Architect exam, the phase that matters most is the first one. Cost estimation.
The cost estimation flow starts with your existing infrastructure. Migration Center can auto-discover four categories of workload: on-premises VMs, SAP workloads, databases, and VMware Engine environments. It scans your environment and pulls in the specifications without you typing anything in by hand. That auto-discovery does not cover every workload type imaginable, but it covers the ones that show up in exam scenarios.
From there, Migration Center analyzes what it found. It looks at the resource requirements of each workload, CPU, memory, storage, network, and maps those to equivalent GCP resources. The output is a cost projection that tells you what it would cost to run those workloads on Google Cloud.
The value is that you do not have to manually translate an on-premises VM inventory into a list of Compute Engine machine types. Migration Center does the discovery and the mapping for you.
This is the comparison the Professional Cloud Architect exam wants you to make. The Pricing Calculator is the general-purpose tool for estimating GCP costs. You pick a service, fill in the specs, and it gives you a price. It works fine when you already know exactly what you want to deploy and you only have a handful of resources.
It falls apart on migration scenarios. If you have a fleet of on-premises VMs, an SAP landscape, a set of databases, or a VMware estate, the Pricing Calculator forces you to manually input every single resource specification. For an enterprise migration, that is hundreds or thousands of line items, and you have to know each spec before you can enter it.
Migration Center automates the discovery side of that work. It scans the source environment, pulls the specs directly, and understands the specific requirements of workload types like SAP and VMware that have nontrivial sizing rules. The result is faster, more convenient, and more accurate cost estimates than what you would get by hand-entering the same workloads into the Pricing Calculator.
So when the exam describes a scenario where the goal is estimating costs for migrating an on-premises environment, and especially when the scenario mentions SAP, databases, or VMware, the answer is Migration Center, not the Pricing Calculator.
The cue is straightforward. If a question is about migration cost estimation and one of the options is Migration Center, that is almost always the right answer over the Pricing Calculator. The Pricing Calculator is for estimating costs of new or known deployments. Migration Center is for estimating costs of moving existing infrastructure where you need automated discovery to make the estimate practical.
Watch for the workload signals in the question. On-prem VMs, SAP, databases, VMware Engine, those are the auto-discovery categories Migration Center handles. When you see them in a cost estimation scenario, Migration Center is the answer.
My Professional Cloud Architect course covers Migration Center and cost estimation alongside the rest of the advanced architecture material.
